阅读说明：本技术 一种可避免水冲击影响的露天矿双拱道路的施工方法 (Construction method of strip mine double-arch road capable of avoiding influence of water impact ) 是由 陈树召 肖藏岩 韩流 杨猛 于 2021-07-27 设计创作，主要内容包括：本发明公开了一种可避免水冲击影响的露天矿双拱道路的施工方法,包括如下步骤：S1：在每一个车道的中间位置沿其中心线堆积剥离的砂石路拱；S2：构筑挡土墙,开挖主排水沟,在挡土墙的内侧开挖外边沟,在整条道路的中间位置修筑中部排水沟；S3：在露天矿距离电源区最远端位置开设集水井；S4：沿着垂直于运输道路的方向开挖多条集水沟,每条集水沟从左至右依次连通中部排水沟、外边沟和下层台阶坡面处的主排水沟,在每个集水沟中布置一根集水管路,然后填平集水沟；S5：几种排水沟内均安装集水漏斗,通过三通连接为整体。通过本发明缩短雨水在路面的停留时间,从而减少入渗和侵蚀,提高道路排水效果。(The invention discloses a construction method of a strip mine double-arch road capable of avoiding the influence of water impact, which comprises the following steps: s1: piling stripped gravel road arches along the central line of each lane at the middle position of each lane; s2: constructing a retaining wall, excavating a main drainage ditch, excavating an outer ditch on the inner side of the retaining wall, and constructing a middle drainage ditch in the middle of the whole road; s3: a water collecting well is arranged at the position of the strip mine, which is farthest from the power supply area; s4: excavating a plurality of water collecting ditches along a direction vertical to the transportation road, wherein each water collecting ditch is sequentially communicated with a middle drainage ditch, an outer side ditch and a main drainage ditch at the slope surface of the lower-layer step from left to right, a water collecting pipeline is arranged in each water collecting ditch, and then the water collecting ditches are filled; s5: the water collecting funnels are installed in the drainage ditches and are connected into a whole through a tee joint. The invention shortens the retention time of rainwater on the road surface, thereby reducing infiltration and erosion and improving the road drainage effect.)

1. A construction method of a strip mine double-arch road capable of avoiding the influence of water impact is characterized by comprising the following steps:

s1: on a step-shaped road surface (1) formed in the process of mining strip mines, dividing the road surface (1) into two lanes with the same width at left and right, piling up stripped gravel road arches (2) along the central line of each lane at the middle position of each lane, paving gravel by using a road grader or a front loader to form an inverted V shape, forming the road surface at one time, and making the cross section of the whole road into an M shape;

s2: constructing a retaining wall (5) on one side of the road plane far away from the upper step slope surface (3), excavating a main drainage ditch (4) on one side of the road near the upper step slope surface (3) by using a ditcher, wherein the main drainage ditch (4) comprises an impermeable layer and a surface layer, then excavating an outer ditch (6) on the inner side of the retaining wall (5), constructing a middle drainage ditch (7) in the middle of the whole road, and all the drainage ditches are V-shaped or rectangular, adopting cement to wipe the surface to improve the flatness and construct the impermeable layer, and setting the depth to be 0.5-1.0 m;

s3: a water collecting well is arranged at the position of the strip mine, which is farthest from the power supply area;

s4: excavating a plurality of water collecting ditches (8) at intervals of 100-150 m along the direction vertical to the transportation road, sequentially communicating each water collecting ditch (8) with a middle drainage ditch (7), an outer drainage ditch (6) and a main drainage ditch (4) at the lower-layer step slope (9) from left to right, arranging a steel water collecting pipeline with the diameter of 20-40cm in each water collecting ditch (8), and filling up the water collecting ditches (8);

s5: the water collecting funnels are arranged in the drainage ditches, the vertical middle drainage ditch (7), the outer edge ditch (6), the main drainage ditch (4) on the lower-layer step slope surface (9) and the transverse water collecting pipeline are connected into a whole through the tee joint, water in the drainage ditches is led to the water collecting pipeline, and finally flows into the water collecting well in the step S3.

2. The method for constructing a double-arch road for an open-pit mine capable of avoiding the impact of water impact according to claim 1, wherein the slope of the sand-piled crown (2) in step S1 is set to be 1% to 3% and the thinnest point is not less than 30 cm.

3. The method for constructing a double-arched road for open-pit mines according to claim 2, wherein the inclination of all the drainage ditches along the direction of the water collection well is set to 1-3 ° in step S2.

4. The method for constructing a double-arch road for an open-pit mine capable of avoiding the impact of water according to claim 1 or 2, wherein filter screens are arranged in the drainage ditches.

Technical Field

The invention particularly relates to a construction method of a strip mine double-arch road capable of avoiding the influence of water impact, and belongs to the field of coal mining.

Background

For strip mines that employ discontinuous or semi-continuous processes for coal mining, the road surface quality of the haul road is directly related to the transport efficiency and the transport cost, and has a significant impact on the strip mine benefits.

The width of a transport road of an open pit, particularly a domestic large open pit, is limited by the volume of transport equipment, and the width of the transport road of the open pit is wider, and some transport roads even reach 40-50m, so that the road is difficult to drain in rainy days, accumulated water is easily formed to corrode the road surface and a roadbed, the road surface is muddy, the vehicle falls or a large gully appears, the driving safety and the transport efficiency are seriously influenced, and the condition is more obvious and the influence is more serious on a refuse dump transport road built by loose materials.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a construction method of a double-arch road of a strip mine, which can avoid the influence of water impact, so as to solve the problems that the driving safety is influenced and the transportation efficiency is reduced due to the fact that the road condition is poor when the existing transportation road of the strip mine meets the problem of water accumulation.

In order to achieve the purpose, the invention adopts the technical scheme that:

a construction method of a strip mine double-arch road capable of avoiding the influence of water impact comprises the following steps:

s1: on a step-shaped road surface formed in the process of mining strip mines, dividing the road surface into two lanes with the same width at the left and the right, stacking stripped gravel road arches along the central line of each lane, paving gravel by using a road grader or a front loader to form an inverted V shape, forming the road surface at one time, and enabling the cross section of the whole road to be M-shaped;

s2: constructing a retaining wall on one side of the road plane far away from the upper step slope, excavating a main drainage ditch on one side of the road near the upper step slope by using a ditcher, wherein the main drainage ditch comprises an impermeable layer and a surface layer, then excavating an outer ditch on the inner side of the retaining wall, constructing a middle drainage ditch in the middle of the whole road, and all the drainage ditches are V-shaped or rectangular, and are all coated with cement to improve the flatness and construct the impermeable layer, and the depth is set to be 0.5-1.0 m;

s3: a water collecting well is arranged at the position of the strip mine, which is farthest from the power supply area;

s4: excavating a plurality of water collecting ditches at intervals of 100-150 m in the direction perpendicular to the transportation road, wherein each water collecting ditch is sequentially communicated with a middle drainage ditch, an outer side ditch and a main drainage ditch at the slope surface of the lower step from left to right, a steel water collecting pipeline with the diameter of 20-40cm is arranged in each water collecting ditch, and then the water collecting ditches are filled;

s5: the water collecting funnels are installed in the drainage ditches, the vertical middle drainage ditch, the outer ditch, the main drainage ditch on the slope surface of the lower step and the horizontal water collecting pipeline are connected into a whole through the tee joint, water in the drainage ditches is led to the water collecting pipeline, and finally flows into the water collecting well in the step S3.

Furthermore, the slope of the road arch formed by sand and stone accumulation in the step S1 is set to be 1% -3%, and the thinnest part is not less than 30 cm.

Further, all the drainage ditches are set to be inclined by 1 to 3 degrees in the direction of the water collection well in step S2.

Furthermore, filter screens are uniformly arranged in the drainage ditches.

The invention has the beneficial effects that: the road construction method of the invention can shorten the retention time of rainwater on the road surface, thereby reducing infiltration and erosion. Compared with the cross section of the road with the same transverse gradient, the quantity of the roadbed or the road surface engineering caused by the road arch is reduced by more than 3/4. The heavy truck runs across the center of the lane, so that the gravity center offset of the truck caused by road arch is avoided, the loss of the truck is reduced, and the road drainage effect can be improved by adopting a larger road cross slope. When the heavy truck runs on the ramp, the influence of the cross slope of the road can be avoided, and the longitudinal slope is equal to the synthetic slope, so that the effective slope of the ramp is improved, and the length of the ramp is shortened.

Drawings

FIG. 1 is a side view of a roadway after construction;

FIG. 2 is a top view of the roadway after construction;

in the figure, 1-road surface, 2-road arch, 3-upper step slope, 4-main drainage ditch, 5-retaining wall, 6-outer ditch, 7-middle drainage ditch, 8-water collecting ditch and 9-lower step slope.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

A construction method of a strip mine double-arch road capable of avoiding the influence of water impact, as shown in figures 1 and 2, comprises the following steps:

s1: on a step-shaped road surface 1 formed in the process of mining open mines, the section is a horizontal plane, the road surface 1 is divided into two lanes with the same width on the left and right sides, the lanes are used as normal mine transportation roads, two lanes with one lane for one time are needed, sand stone road arches 2 stripped off are accumulated at the middle positions of the left lane and the right lane along the central lines of the lanes, sand stones are paved by a road grader or a front loader to form an inverted V shape, the road surface is formed in one step, the cross section of the whole road is M-shaped, in order to better achieve the effect of evacuating water and not influence the normal running of vehicles, the gradient of the road arch 2 formed by the sand stone accumulation is set to be 1% -3%, the thinnest position is not less than 30cm, the height of the road arch 2 is too low to be easily submerged by water, and the effect of evacuating accumulated water is not achieved.

S2: a retaining wall 5 is constructed on one side of the road plane far away from the upper-layer step slope surface 3, a main drainage ditch 4 is excavated on one side of the road near the upper-layer step slope surface 3 in a way of being parallel to the lane direction, and the main drainage ditch 4 comprises an impermeable layer and a surface layer. Then, an outer side ditch 6 parallel to the retaining wall 5 is excavated on the inner side of the retaining wall 5, a middle drainage ditch 7 parallel to the main drainage ditch 4 is built in the middle of the whole road surface 1, the drainage ditches are all V-shaped or rectangular, cement is adopted for plastering to improve the flatness and construct an impermeable layer, the flow rate of water flow can be accelerated, and erosion is reduced. The depth is set to be 0.5-1.0 m, and the depth is the most appropriate depth, and the flow of the matched drainage is enough for the road condition of the accumulated water in the mining area. Meanwhile, in order to play a role of faster drainage, all drainage ditches are arranged to be inclined by 1-3 degrees along the direction of the water collecting well, and the inclination is more favorable for promoting the drainage by utilizing the action of the gravity of water.

S3: a water collecting well is arranged at the position of the strip mine, which is farthest from the power supply area;

s4: excavating a plurality of water collecting ditches 8 at intervals of 100-150 m along the direction vertical to the transportation road, wherein each water collecting ditch 8 is sequentially communicated with a middle drainage ditch 7, an outer side ditch 6 and a main drainage ditch 4 at the lower-layer step slope 9 from left to right, a steel water collecting pipeline with the diameter of 20-40cm is arranged in each water collecting ditch 8, and then the water collecting ditches 8 are filled;

s5: the water collecting funnels are arranged in the drainage ditches, the vertical middle drainage ditch 7, the outer edge ditch 6, the main drainage ditch 4 on the lower-layer step slope surface 9 and the transverse water collecting pipeline are connected into a whole through the tee joint, water in the drainage ditches is led to the water collecting pipeline, and finally flows into the water collecting well in the step S3. In order to prevent the water collecting pipeline from being blocked, filter screens are also arranged in all the drainage ditches to prevent sundries such as stones, plant branches and the like from entering the water collecting pipeline.

The method of the invention reforms the coal mining area step section, the accumulated water is collected in the water collecting well by digging the drainage ditch and guiding the water to the water collecting pipeline of the water collecting ditch 8, the influence of the erosion of the accumulated water on the road surface 1 to the road surface and the roadbed on the running of the transport vehicle is reduced, thereby reducing the problem of transport efficiency in the mining area, and the construction process is simple and the drainage effect is excellent.